The ADP3020 is a highly efcient dual synchronous buck switch-
ing Regulator controller optimized for converting the battery or
adapter input into the system supply voltages required in note-
book computers. The ADP3020 uses a dual-mode PWM/Power
Saving Mode architecture to maintain efciency over a wide
load range. The Oscillator frequency CAN be programmed for
200 kHz, 300 kHz, or 400 kHz operation, or it CAN be synchro-
nized to an external Clock signal of up to 600 kHz.
The ADP3020 provides accurate and reliable short circuit pro-
tection using an internal Current Sense circuit, which reduces
cost and increases overall efciency. Other protection features
include programmable soft-start, UVLO, and integrated output
undervoltage/overvoltage protection. The ADP3020 contains a
linear Regulator controller that is designed to drive an external
P-Channel MOSFET or PNPTransistor The linear Regulator
output is adjustable, and CAN be used to generate the auxiliary
voltages required in many laptop designs. By Analog Devices, Inc.